ASTM E92

ASTM E92

Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials
Standard Test Method for Vickers Hardness of Metallic Materials
STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS
STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS
Standard Test Method for Vickers Hardness of Metallic Materials
STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS
STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS

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Publication Date: 02/01/2016 - Complete Document

Description :

These test methods cover the determination of the Vickers hardness and Knoop hardness of metallic materials by the Vickers and Knoop indentation hardness principles. This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests.

This standard includes additional requirements in annexes:

This standard includes nonmandatory information in an appendix which relates to the Vickers and Knoop hardness tests:

This test method covers Vickers hardness tests made utilizing test forces ranging from 9.807 × 10-3 N to 1176.80 N (1 gf to 120 kgf), and Knoop hardness tests made utilizing test forces from 9.807 × 10-3 N to 19.613 N (1 gf to 2 kgf).

Additional information on the procedures and guidance when testing in the microindentation force range (forces ≤ 1 kgf) may be found in Test Method E384, Test Method for Microindentation Hardness of Materials.

Units—When the Vickers and Knoop hardness tests were developed, the force levels were specified in units of grams-force (gf) and kilograms-force (kgf). This standard specifies the units of force and length in the International System of Units (SI); that is, force in Newtons (N) and length in mm or μm. However, because of the historical precedent and continued common usage, force values in gf and kgf units are provided for information and much of the discussion in this standard as well as the method of reporting the test results refers to these units.

NOTE 1—The Vickers and Knoop hardness numbers were originally defined in terms of the test force in kilogram-force (kgf) and the surface area or projected area in millimetres squared (mm2). Today, the hardness numbers are internationally defined in terms of SI units, that is, the test force in Newtons (N). However, in practice, the most commonly used force units are kilogram-force (kgf) and gram-force (gf). When Newton units of force are used, the force must be divided by the conversion factor 9.80665 N/kgf.

The test principles, testing procedures, and verification procedures are essentially identical for both the Vickers and Knoop hardness tests. The significant differences between the two tests are the geometries of the respective indenters, the method of calculation of the hardness numbers, and that Vickers hardness may be used at higher force levels than Knoop hardness.

NOTE 2—While Committee E28 is primarily concerned with metallic materials, the test procedures described are applicable to other materials. Other materials may require special considerations, for example see C1326 and C1327 for ceramic testing.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 

Document Type : Complete Document

Language : English

Page Count : 27

Publication Date : 02/01/2016

Revision : 16

Status : Current

Title : Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials

Publication Date: 07/30/1982 - Complete Document Changes Incorporated

Description :

This test method covers the determination of the Vickers hardness of metallic materials, using applied forces of 1 kgf to 120 kgf,(Footnote 2) the verification of Vickers hardness testing machines (Part B), and the calibration of standardized hardness test blocks (Part C). Two general classes of standard tests are recognized:

Verification, Laboratory, or Referee Tests, where a high degree of accuracy is required.

Routine Tests, where a somewhat lower degree of accuracy is permissible.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Footnote 2 - A procedure covering Vickers tests using applied forces of 1 gf to 1000 gf (1 kgf) may be found in Test Method E 384, Test Method for Microindentation Hardness of Materials, appearing in the Annual Book of ASTM Standards, Vol 03.01.

Document Type : Complete Document

Language : English

Page Count : 9

Publication Date : 07/30/1982

Revision : 82

Status : Historical

Supplement : W/

Title : Standard Test Method for Vickers Hardness of Metallic Materials

Publication Date: 10/01/1997 - Base Document Changes Incorporated

Document Type : Base Document

Page Count : 9

Publication Date : 10/01/1997

Revision : 82

Status : Historical

Supplement : W/

Title : STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS

Publication Date: 08/01/1992 - Base Document Changes Incorporated

Document Type : Base Document

Page Count : 9

Publication Date : 08/01/1992

Revision : 82

Status : Historical

Supplement : W/

Title : STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS

Publication Date: 07/30/1982 - Complete Document

Description :

This method covers the determination of the Vickers hardness of metallic materials, using applied loads of 1 kgf to 120 kgf,2 the verification of Vickers hardness testing machines (Part B), and the calibration of standardized hardness test blocks (Part C). Two general classes of standard tests are recognized:

Verification, Laboratory, or Referee Tests, where a high degree of accuracy is required.

Routine Tests, where a somewhat lower degree of accuracy is permissible.

Document Type : Complete Document

Language : English

Page Count : 12

Publication Date : 07/30/1982

Revision : 82

Status : Historical

Title : Standard Test Method for Vickers Hardness of Metallic Materials

Publication Date: 01/01/1977 - Complete Document Changes Incorporated

Document Type : Complete Document

Page Count : 0

Publication Date : 01/01/1977

Revision : 72

Status : Historical

Supplement : W/

Title : STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS

Publication Date: 01/01/1972 - Base Document

Document Type : Base Document

Page Count : 0

Publication Date : 01/01/1972

Revision : 72

Status : Historical

Title : STANDARD TEST METHODS FOR VICKERS HARDNESS AND KNOOP HARDNESS OF METALLIC MATERIALS

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